Weft detecting mechanism for multicolor shuttle changers



. y 1936- R. G. TURNER 2,054,174

WEFT DETECTING MECHANISM FOR MULTICOLOR SHUTTLE CHANGERS Fil ed April22,1933 {Sheets- Sheet 1 F L V LQI Qne at o v" Richard GnTuvne? (l'ttorneusSept. 1 5, 19306.v R G "TURNER 2,054,174

WEYFT DETECTING MECHANISM FOR MULTICOLOR SHUTTLE CHANGERS Filed April22, 1935 4 Sheets-51199111 smsen t o r Richawi GrTurner Sept 15, 1936. RG TURNER- I 2,054,174

WEFT- DETECTING MECHANISM FOR MULTICOLOR SHUTTLE CHANGERS Filed April22, 1953 4 Sheets-Shet s P 1935- R. G. TURNER I I 2,054,174 WEFTDETECTTNG MECHANISM FOR MULT ICOLOR SHUTTLE CHANGERS I Filed April 22,1935 4 Sheets-Sheet 4 -nuentor Rmhard (En Turner (1.1.1.0 r ne PatentedSept. 15, 1936 UNITED STATES PATENT OFFIQE WEFT DETECTING MECHANISM FORMUL- TICOLOR SHUTTLE CHANGERS Richard G. Turner, Worcester, Mass.,assignor to Crcmpton & Knowles Loom Works, Worcester, Mass, acorporation of Massachusetts Application April 22, 1933, Serial No.667,464

In order to prevent the fresh shuttle from 26 Claims.

which during normal operation is common to all 7 the active shuttles. Inshuttle changing looms of this general type it has been found desirableto place the weft detecting mechanism at the magazine side of the loomso that it can cooperate with the shuttle box which does not ordinarilymove relatively to the lay at the time of detection. Inclication storingmechanism can be employed so that a shuttle which indicates exhaustionon any pick of the loom can be changed upon its subsequent arrival underthe magazine.

In looms of this type there exists the problem indication of weftexhaustion. The detector mechanism will detect the shuttles to bereplaced upon its subsequent arrival under the magazine unless preventedfrom doing so. This result may foe accomplished by moving the detectoraway from its normal position when a shuttle is to be changed or theshuttle boxes at the magazine end may be moved in such a way as toprevent a second contact of the detector with the depleted shuttle. Thislatter result can be accomplished by effecting change of shuttle whenthe lay is in rear position with the depleted shuttle at its farthestdistance from the weft detector.

The invention is particularly adaptable to looms wherein shuttle changeis accompanied by movement of a shuttle box toward the supply of re--serve shuttles. In such looms the box mechanism must be free to shift atthe time of shuttle change without damaging the detector, or having itsmovements obstructed thereby. This applies both to the rising andfalling movements of the shuttle box.

In my co-pending. application Serial No. 655,140, I have set forth aloom wherein the de- 50 tecting mechanism is mounted on a lay carriedpart and is moved out of the path of the incoming fresh shuttle at thetime of shuttle change. In

the present instance I employ a detecting mechanism which is mounted ona relatively fixed part 5510f the loom.

multicolor shuttle of effecting replenishment Without repeating thebreaking the thread of the outgoing shuttle, the

latter is preferably discharged forwardly. The most practicable locationfor the detector is in front of the lay, and it is a further object ofmy invention to eject the depleted shuttle forwardly withoutinterference with the detector.

This result may be accomplishedby lowering the empty shuttle to a pointbelow the detector before actual discharge from the lay occurs.

With these and other objects in view which will appear as thedescription proceeds, my invention relates to the combination andarrangement of parts hereinafter described and set forth inthe claims. e

In the accompanying drawings, wherein I have shown two forms ofdetectors,

Fig. 1 is a. diagrammatic side elevation of a loom having the preferredform of my invention applied thereto, 7

Fig. 2 is aside elevation of the lower part of the mechanism shown inFig. 1 which raises the changing boxes,

Fig. 3 is a top plan view of the selector mechanism looking in thedirection of arrow 3, Fig. 2,

Fig. 4 is a detail vertical section on line 44, Fig. 3,

Fig. 5 is a sideelevation of the upper partof the mechanism shown inFig. 1,

Fig. 6 shows a detail top plan view of the weft detector shown in Fig.1,

Fig. '7 is a side elevation, partly in section, of the upper part of aloom having a modified or electrical form of weft detector,

Fig. 8 is a horizontal section on line 88 of Fig. 7 through the detectormechanism,

Figs. 9 to 11 are diagrammatic views showing the parts in successivepositions at the time of shuttle change, and

Fig. 12 is a fragmentary top plan view looking in the direction of arrowl2, Fig. 10.

Referring particularly to Figs. 1, 2, and 5, I have shown a loom frame20 on which maybe mounted multicolor shuttle changing mechanism of the.

of a plunger 22-.

The latter may be actuated by a lever 23 rocked to move the plungerforwardly, or to the left as viewed in Fig. 5, whenever the pull rod 24is lowered. Delivery from the front stack is accomplished by rockinglever 25 by a pull rod A l k 2'! connects lever 25 with a release arm 45a pin 44.

, end of the latch in the full line position shown in Fig. 4 so that asit rises there will be no contact V .51 of a solenoid 58 mounted on thelever 49.

a 28 having a finger 25 which extends under the lowest shuttle of thefront stack. When this finger is moved forwardly the bottom shuttle isreleased, and mechanism not shown herein but 5 set forth in theaforesaid application supports the super-imposed shuttles.

, The lay L is provided with rearwardly extending fingers so positionedat all times to support a shuttle which is delivered from the magazine.

The front shuttles of the magazine fall directly on this plate, Whilethe rear shuttles are pushed thereon from the platform 2! The magazineitself forms no part of my present invention and can deliver shuttlesthrough the throat 3| as disclosed in the aforesaid application and alsoin copending application Serial No. 560,573. g

The mechanism for actuating the pull rods 24 and 26 is shown moreparticularly in Figs. 2, 3

a a and 4. A fixed stand 32 mounted on a stationary f stud 33 haspivotally mounted at the right hand end thereof as shown in Fig. 2 apositioning lever 34-with a head 35 which has sliding and guidingengagement with the rods 24 and 2B. 7 The lower end of each rod has ahook 38, and the position of the; hooks horizontally is determined by aflexible connection 31-passing around a sheave 38 and extending to theopposite side of the loom, where it has connection with some part'of theshifting box control mechanism, either directly to the boxes or to somepart controlled by the pattern chain. These connections may be as shownin the aforesaid application, or as set forth in my co-pendingapplication, Serial No. 665,140.

7 Shifting'of the boxes at the drop box-side of' the loom is thereforeaccompanied by a rocking of the lever 34 so that one of the other ofsaid hooks 36 is presented in the path of a-lug 39 carried by a normallystationary operating lever All. The latter is pivoted on the stud 33 andhas O the forward, or left hand end as viewed in Fig. 2,

connected to a box lifter rod M.

A regularly moving actuator lever 42 is also pivotally mounted on thestud 33' and carries at its forwardend a lifting latch 43 pivotedthereto by A coil spring 45 acts to hold the upper between the latchandthe log 46 integral with the operating lever 40.

50 l The mechanism for controlling the latch is set forth herein inFigs. 2, 3 and 4 and may be substantially the same as shown inco-pending application Serial No. 3,734/filed by Holmes and Cederlund,and is mounted on the operating lever.

'55 Th'is mechanism includes a selector frame '55 slidable on a pair ofrods 5! fixed to lever 40.

In the present instance the frame has pivoted thereto a pair ofselectors 52 and 53, respectively. A rod 54 connects lever 34 with theslide 50 to 60 position the'latter, depending upon which of theweavingshuttles is active, so that one or the other of the selectorswill be in alignment with 'the setting finger 55. The latter forms partof a indication will rock to the position occupied by selector 53 in thesame figure. The lower part of'the s elector is formed to direct the topof the latch against the lug 46, and the latch can engage but one at atime, namely, the one which is in 75 alignment with the. finger 55. 'Astationary resetter 59 restores to normal the indicated selector whichcauses a shuttle change.

In the preferred form of the invention I employ a well-known weftdetecting mechanism 65 of the so-called external type,.having a body asmounted on a fixed support 61 preferably rigid with respect to the loom.A slide 8.8 in the body is movable toward and from the lay and haspivotally mounted at the rear end thereof a detector jaw 69. The latterhas an indicating finger 10 extending forwardly of the pivot H, and aspring 12 in the body holds the indicating finger against a stop pin 13on the slide.

The lay has upper and lower shuttle boxes B and B respectively, whichare normally down so that the upper box is in picking position toreceive each active shuttle when the latter is on the magazine side ofthe loom. As the lay advances the detector jaw will enter the shuttlebox B and the shuttle therein to detect condition of weft,

and if sufficient of the latter be present the de- I tector jaw andslide will move forwardly. When insufficient weft is present, however,the slide remains at rest and the detector moves about the pivot H tocause the indicating finger it! to engage an electric contact 14 mountedon an insulated support. When this happens current flows'through thefollowing circuit,'see Fig. 1: ground G, wire 15, the solenoid 58, wire16 to the source of electric power TI, wire E8 to the contact 74, finger10 back to the ground, the frame of the. feeler mechanism being groundedto establish an electric return. This results in attraction of the core5! with a setting of oneor the other of the selectors, as previouslydescribed, depending upon which weaving shuttle is active. The detectormechanism may be the same as that shown in U. S. Patent to Payne No.1,738,198, modified to close an electric circuit. a

The indication which is stored in the mechanism shown in Figs. 3 and 4will efiect'a shuttle change on the second pick after indication ifthere is no shift of the boxes at the oppositeend of the loom, and whenthis occurs the operating lever will rock to raise the boxes B and B andalso to actuate the magazine through one or the other of the pull rods24 or 26.

The matter thus far described may be as set forth in the aforesaidapplications and patents, and of itself forms no part of my presentinvention.

It is to be understood that in the loom to which my present inventionapplies the depleted shuttle is picked from the detector side of theloom when the lay is at top center and is boxed a little more thanone-half a pick later when the loom reaches protection point. shiftingboxes will start to rise or fall if a change inactive weaving shuttle isto occur, this shift continuing through front center and being completedwhen the lay is again 'at top center for picking. In order that theboxes at the magazine end of the loom may be shifted so that thedepleted shuttle which is to arrive from the opposite or shiftingshuttle box end of the loom may'enter the lower'box B the shift of theseboxes starts shortly after thetime for the drop boxes to begin theirmovement, with the result that the changing boxes will be shifting whenthe lay has moved them close to the'weft detector. When the depletedshuttle reaches the magazine side of the loom it will enter the lowerbox 13 which is temporarily raised on a line with the race, and the topbox B will receive a shuttle from the magazine W en t ay is in its rear-Thereafter the a ward position. When the lay again reaches theprotection point in its forward motion the changing boxes can move downto bring the top box opposite the race for the following pick of theshuttle.

When the boxes start to rise in the operation just described, someprovision must be made whereby their motion will not injure the detectorjaw 59 and in carrying the preferred form of my invention into effect Iaccomplish this result by a withdrawal of the detector prior to therising of the boxes. In this form of the invention the cam may be of thetype set forth in the previously described applications to rock thelever d2 as in previously known constructions. The feeler slide 68 hasan upturned end 82 attached to a pull wire 83 which as shown in thepresent instance may pass through a coil wire sheath 84. The latter isfastened at its upper end preferably to the stand of the feeler and atits lower end to the loom frame, the wire 83 extending beyond to haveattachment with an extension 85 of the operating lever 49. Thisextension multiplies the motion of the lever so that the detector ismoved out at a faster rate than the boxes rise and I am therefore ableto control both the rising of the boxes and the withdrawal of the feelerfrom the same moving part of the loom. I do not wish to be limited,however, to this joint control of these parts.

The connection described not only holds the feeler out of the range ofthe moving empty boxes at the start of a changing operation, but alsoholds it out during return movement of the boxes to normal position whenboth are occupied.

The detector passes through a slot 86 (Fig. 5) formed in a binder 8!which is stationary with respect to the lay, that is, the binder doesnot share the rising and falling movements of the boxes 3 and B When thechanging boxes reach normal down position the depleted shuttle in thelower box passes forwardly under the fixed binder.

The modified form of the invention employs an electrical detector Ecomprising a body 93 of insulating material in which are located twodetector wires 98 and 92, respectively. Each wire is surrounded by acoil spring 93 housed in a cavity in the body of the detector andlocated between a shoulder 54 at the rear of the wire and a screw'plugthreaded into the body of the detector and through which the wire isfreely movable. Wires 96 and 91 are in electric contact with detectorfingers or wires 9! and 92, respectively. The bobbin *8 is provided witha ferrule or other metallic surface 99, which when uncovered willelectrically connect the electrodes 9! and 82.

In order to support the detector I provide the magazine with a standI!!!) and pivotally mount thereon as at lei a supporting lever E62 thelower end of which has a platform E03 to which the detector is fastenedby a bolt lfi l. Spring l B5 is interposed between the lever and thestand mo and acts to hold the detector yieldingly in rear position. Astop I06 on the stand i051 engages the lever to limit movement thereofunder influence of the spring.

The electrodes enter the upper shuttle box, and the lay in the modifiedform, together with the shuttle boxes and magazine, may be as in thepreferred form, except that the cover Illl of the box is modified. Aleaf spring H0 secured to the lever I02 has shoulders Ill and a tongueelectrodes 9! and 92 will result in upward movement of these changingboxes as the lay moves rearwardly. When the box cover is lifted as in Vthe preferred form a reserve shuttle will be drawn from the proper stackin the magazine to enter the upper box, and when the depleted shuttle isreceived by the lower box 13 these boxes will begin to move down as thelay moves forwardly. The box cover will be swung up as previouslydescribed when the lay is in rear position, but as the latter advancesthe cover will return to assist in boxing the fresh shuttle and willassume the position shown in Fig. 10. Further advance movement of theboxes will cause the tongue H2 to enter the opening H3 while the boxesare still somewhat above their normal downward position. The advancingbox cover thereafter engages the shoulders I II to move the lever I92forwardly from the position shown in Fig. 10 to that shown in Fig. 11with the electrodes of the detector clear of the boxes and the shuttlescontained therein. When the boxes are in low position the depletedshuttle 7 H20 is ejectedforwardly below the detector as shown in Fig.11.

As the lay moves backwardly the tongue will follow the cover until thelever "32 engages stop I96, after which the box cover will move awayfrom the tongue and the spring will return to the normal position shownin Fig. '7. Thereafter forward movements of the lay will move the boxcover under the spring I M.

As shown in Fig. 9 the initial upward movement of the boxes preparatoryto shuttle change will flex the spring Ht but the latter is able toyield without injury, and as previously described the cam will act todelay this upward movement until after the boxes have moved rearwardlyfar enough to miss the fingers 9! and 92.

From the foregoing it will be seen that I have provided a weft detectorof the external type on so that the forward parts of the detectingmechanism are shielded by this binder against any desire of the shuttleto move forwardly. It will further be seen that the parts are so relatedthat a repeated indication cannot be given by the depleted shuttle to beexpelled from the lay, and that the invention is equally applicable todetectors which derive their indication from a mechanical operationwithin a shuttle or electrically by engagement of a conducting surface.7

Having thus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

1. In a shuttle changing loom, a lay, a magazine having a plurality ofgroups of reserve stacks of shuttles, means defining a common deliverythroat for the magazine through which a shuttle drawn from any one ofthe groups passes at the Z-time of shuttle change, a shuttle'box movablerelatively to the lay and toward said throat at the time of shuttlechange to receive a reserve shuttle, weft detecting mechanism to controlthe shuttle box and enter the latter to detect the .condition of wefttherein, and means to prevent engagement of the detector and shuttle boxwhen the latter moves toward the throat of the magazine.

2. In a shuttle changing loom having a lay, a group of reserve shuttles,a shuttle box on the lay movable relatively to the lay toward the groupto receive a reserve shuttle in a shuttle changing operation of theloo-m, a weft detector to enter the box on non-changing beats of theloom due tomovem-ent of the box to detect the condition of weft thereinand initiate a shuttle change at substantial exhaustion of weft, andmeans to Withdraw the detecting mechanism from said' shuttle when thelatter moves toward the group. 3. In a shuttle changing loom having alay, a group of reserve shuttles, a shuttle box on the lay, a'detectorto enter the box due to movement of the box to detect the condition ofweft therein, means'controlled by the detector to move the shuttle boxrelatively to the lay toward the group in a direction transverse of thedetector mechanism, and means "to move the latter out ,of engagingrelation with respect to the box when the latter moves toward the group.

4..In a shuttle changing loom having a lay, a group of reserve shuttles,a shuttle box on the lay normally spaced from the group, means to movesaid shuttle box toward the group to receive a reserve shuttletherefrom, weft detecting mechanism controlling said means and renderedeifective by movement of the box to enter the shuttle box and detect thecondition of weft therein when the box is in normal position, and meansto move the Weft detector to provide a clear path for the shuttle boxand reserve shuttle therein as said box and shuttle move from a positionnear the group to the normal position.

' 5. In; a shuttle changing loom having a lay, a group of reserveshuttles, a shuttle box normally spaced from the group but movable withrespect to the lay toward the group, a weft detector mechanism to enterthe shuttle box when the latter is in normal position to detect thecondition of wefttherein, and means to move the shuttle box toward thegroup and also the detector out of the path of the shuttle box when thelatter moves toward the group.

7 serve shuttles, a weft detector adjacent the group,

'a lay movable toward and from the weft detector,

a pair of changing shuttle boxes on the lay under control of. thedetector, one of the boxes normally being positioned to receive thedetector for normal detecting operations, and one of said boxes :toreceive the depleted shuttle for forward ejectment therefrom, and meansto relativelyposition the detector and the shuttle box which receivesthe depleted shuttle so that the detector will be vertically displacedfrom the path of the depleted shuttle as it is ejected from the shuttlebox in which it has been received.

8. In' a shuttle changing loom, a group of reserve shuttles, a weftdetector adjacent the group, a lay movable toward and from the detector,a pair of shuttle changing boxes on the lay normally in down position sothat the upper box is operatively placed with respect to .the

detector for the normal detecting operation,

means controlled by the detector to raise the boxes and to effectmovement of a reserve shuttle from the group to the upper box andreceipt of the depleted shuttle in the lower box,'and means,

to thereafter lower the boxes for the ejectment of the depleted shuttlefrom a position below the" weft detector.

9. In a shuttle changing loom, a group of reserve shuttles, a weftdetector adjacent the group,

a lay movable toward and from the detector, a 1 a pair of shuttlechanging boxes on the lay, a binder substantially stationary withrespect to the lay, said binder normally being above the may becomeactive, a magazine having a plu- 7' rality of groups of reserveshuttles, one group for each active shuttle, a shuttle box to receiveany weaving shuttle that is active, a weft detecting mechanism to enterthe shuttle box and detect condition of weft therein, a lay to move thebox toward and from the weft detector means under control of the weftdetector to move the box toward the magazine to receive a shuttle fromthe group corresponding to the active shuttlaand means to insurenon-interference on the part of the detector with the movement of theshuttle box toward the magazine. a

11. In a shuttle changing loom, a plurality of groups of distinctivereserve shuttles, a weft-detector on the reserve shuttle side of theloom to detect the condition of weft in an active shuttle, a lay movabletoward and from the detector selector mechanism operatively interposedbetween the detector and groups, the Weft detector to detect when thelay is forward andmeans jointly controlled by the detector and selectorto replace a depleted active shuttle with a reserve shuttle of the samekind while the lay is in rear- 13. In a shuttle changing loom, a reserveshuttle magazine at one end of the loom, a lay movable back and forthunder the magazine, a

' weft detector on the magazine side of the loom mounted in front of thelay to have a detecting action with respect to the active shuttle due tomovement of the lay, a slideon which the detector is mounted, and meansto; move the slide forwardly on changing beats of the loom to move thedetector to a position of non-interference with the shuttle changingoperation.

- under the magazine to receive the active shuttle and also to receive areserve shuttle from the magazine, a side slipping weft detector toenter the box to detect the condition of weft in the 7 active shuttle,and means to withdraw the side slipping detector from the shuttle box onshuttle changing beats of the loom.

15. In a shuttle changing loom, a group of reserve shuttles at one endof the loom, a lay movable back and forth under the group, a shuttle boxon the lay to receive the active shuttle and movable toward the group toreceive a reserve shuttle, a pair of electrical weft detectors insulatedfrom each other caused to enter the shuttle box due to movement of thelatter toward the detector to determine the condition of weft in the boxand initiate movement of the shuttle box toward the group, and meansunder control of the detector to move the latter out of the path of theshuttle box as the latter moves during the shuttle changing operation ofthe loom, thereby preventing contact of the detectors with the shuttlebox to prevent a repeated indication by the detector.

16. In a shuttle changing loom, a magazine for reserve shuttles, a laymovable back and forth under the magazine, a shuttle box carried by thelay under the magazine, a weft detector to enter the shuttle box todetermine the condition of weft therein and initiate movement of areserve shuttle toward the shuttle box upon depletion of weft in theactive shuttle, a support for the detector movably mounted on and withrespect to the magazine, and means to move said support together withthe detector forwardly from the lay to prevent the detector frominterfering with the shuttle changing operation of the shuttle box.

17. In a shuttle changing loom, a lay movable back and forth, a reserveshuttle magazine located near the backward limit of movement of the lay,a weft detector mounted in front of the lay near the forward limit ofmovement of the lay and effective to control the magazine, and a shuttlebox on the lay to be entered by the weft detector when the lay isforward and to receive a shuttle from the magazine when the lay is rear-Ward.

18. In a shuttle changing loom, a lay movable back and forth betweenfront and rear extreme positions, a magazine of reserve shuttles nearone extreme position, a weft detector to control the magazine near theother extreme of motion of the lay, and a shuttle box movable with thelay between the magazine and the detector, said box to coact with thedetector on a forward stroke of the lay and to coact with the magazineon a subsequent backward stroke of the lay.

19. In a shuttle changing loom operating with a lay having upper andlower shuttle boxes at one end of said lay, a group of reserve shuttlesat the same end of the lay, a weft detector at the same end of the laynormally maintained at a given level to detect the condition of weft inthe active shuttle, and means carried in part by the lay and dependentupon indication of weft exhaustion in the depleted active shuttleby thedetector to effect reception of a reserve shuttle from the group in theupper shuttle box at a level above the level of the detector, to effect,-reception of the depleted active shuttle on the shuttle changing beatof the loom in the lower shuttle box and at the level of the detector,and to subsequently eject the depleted shuttlefrom said lower box at alevel below that of the de-, tector and in a direction toward saiddetector.

23. In a shuttle changing loom having a lay having a plurality ofshuttle boxes, a group of reserve shuttles, a .weft detector mounted infront of the lay and havinga detecting relation with respect to theactive shuttle because of forward motion of the lay, said detectoroperating at a given level, and means carried inpart by the lay andmoving back and forth with the latter and controlled by the detectorwhen the latter indicates exhaustion of weft in the active shuttle torender said means effective to receive a reserve shuttle from the groupin a box above said level and to receive the depleted active shuttle ina second box substantially at said level, said means subsequentlyoperated to move the reserve shuttle substantially to said level-and tomove the depleted shuttle and its box below said level, the lay beingeffective on a forward beat thereof to eject the depleted shuttle fromsaid box at a level below that of the detector and in a direction towardsaid detector.

21. In a shuttle changing loom, a lay movable back and forth therein, areserve shuttle magazine, a shuttle box on the lay, a weft detector rmounted in front of the lay near the forward limit of movement of thelay and positioned to enter the shuttle box as the lay moves forwardly,and mechanism controlled by the weft detector to effect transfer of areserve shuttle from the magazine to the shuttle box when the lay issubstantially at the limit of its rearward movement.

22. In a shuttle changing loom having a lay, a group of reserveshuttles, shuttle boxes normally stationary with respect to the lay butshiftable relatively thereto to receive a shuttle from the group onshuttle changing beats of the loom when the lay is in rearward position,a weft detector rendered operative by lay motion normally to enter oneof the shuttle boxes when the lay is in forward position with the boxesstationary relatively to the lay, and means to withdraw the detectorfrom the path along which the shuttle boxes shift during a shuttlechanging operation of the loom.

23. In a shuttle changing loom, a lay having a shuttle box, a weftdetector mounted in front of the lay on the same side of the loom assaid shuttle box and toward and from which the shuttle moves with thelay, means to effect an additional relative movement between said boxand said detector, and means controlled by the detector to effectdischarge of a depleted shuttle directly forwardly from said shuttlebox' on the 1 ment between said box and said' detector, and

-' means subsequently to effect discharge of the depleted shuttledirectly forwardly from said box f at a level lower than that of thedetector.

25. In a shuttle changing loom, a lay, shuttle box mechanism movablerelatively to the lay,

a weft detector mounted in front of the lay at a 'a given level todetect the active shuttle due to forward motion of the lay, controlconnections between the detector and the shuttle box mechanism to renderthe latter effective to receive a depleted shuttle at the level of theweft detector, means 'to effect relative vertical move- 'ment betweensaid box and said detector, and

- depleted shuttle from the shuttle box mechanism directly forwardlytoward the detector at a level lower' than that of the weft detector.

means to subsequently efiect discharge of the 26. In a shuttle changingloom, a magazine 7 for reserve shuttles, a lay movable back and forthunder-the magazine, a shuttle box, carried by the lay under the magazineand having an active ment of the box during the shuttle changing op 15eration. V

' RICHARD G. TURNER.

